CN116792128A - Net laying device, anchor trolley and method of laying protective net - Google Patents

Abstract

This application discloses a net-laying device for installing a protective net on a tunnel vault. The net-laying device includes a support frame and a plurality of tensioners. The support frame includes a base in the middle and two located on both sides of the base. It also has movable arms in an unfolded state and a folded state. When the two movable arms are unfolded, the shape of the support frame is adapted to the tunnel vault; multiple tensioning members are arranged in parallel on the support frame, so The tensioning member extends along the direction of the plane where the vertical support frame is located. When in use, the tensioning member extends along the depth direction of the tunnel, and the protective net is tightened as the movable arm expands. The movable arm can be moved in the tunnel in a folded state, and when laying the net, the movable arm can be switched to the unfolded state to realize one-time laying of the vault. After the laying is completed, it can be anchored and fixed, which improves the efficiency of the net hanging operation.

Description

Net laying device, anchor trolley and method of laying protective net

Technical field

This application relates to the technical field of tunnel support equipment, specifically a compact and efficient net-laying device, an anchor trolley and a method of laying protective nets.

Background technique

The initial support of the tunnel is mainly used to strengthen the rock wall of the tunnel by hanging nets and anchoring after the tunnel is excavated to prevent loose gravel from falling and injuring personnel or equipment. Among them, for the net hanging equipment, in order to be able to enter the tunnel, for example, the patent document with the publication number CN 218376504 U discloses a net hanging mechanical arm and its anchor trolley, which is small in size and can enter tunnels of various sizes. However, during the process of hanging the net, especially when hanging the net on the arc-shaped vault, due to its own structural limitations, it can only hang for a certain distance first, then anchor, and continue to move for a certain distance. Repeatedly, the net is hung on the tunnel vault. The construction time of the net is longer.

Contents of the invention

This application provides a net-laying device, which has a compact structure and improves the efficiency of net-hanging operations.

This application provides a net laying device for installing protective nets on tunnel vaults, including:

The support frame includes a base in the middle and two movable arms located on both sides of the base and having an unfolded state and a folded state. When the two movable arms are unfolded, the shape of the support frame is consistent with the tunnel vault. adapt;

A plurality of tensioning members are arranged in parallel on the support frame. When in use, the tensioning members extend along the depth direction of the tunnel and tighten the protective net as the movable arm expands.

Several optional methods are also provided below, but they are not used as additional limitations on the above-mentioned overall plan. They are only further additions or preferences. On the premise that there are no technical or logical contradictions, each optional method can be independently implemented for the above-mentioned overall plan. Combination can also be a combination between multiple optional methods.

Optionally, the movable arm is rotatably connected to the base.

Optionally, the movable arm has a multi-segment structure, and two adjacent segments are rotationally connected.

Optionally, in the folded state, the segments of the movable arm are close to each other.

Optionally, each section of the movable arm is arranged staggered in the horizontal direction.

Optionally, a first driving device for driving relative rotation of the two adjacent segments is provided at the connection between the two adjacent segments.

Optionally, it includes a second driving device that drives the two movable arms to rotate toward each other or to expand.

Optionally, the tensioning member is a rod-shaped structure and is arranged outside the support frame.

Optionally, it includes a connecting arm connected to the base and extending in the same direction as the tensioning member, and a support member fixed to the adjacent tensioning member is provided on the connecting arm.

Optionally, a roller for winding the protective net including two tensioning members disposed on the outermost side.

This application also provides an anchor trolley, including any of the above-mentioned net-laying devices and an operating arm connected to the net-laying device.

This application also provides a method for laying a protective net on the tunnel vault, which includes the following steps:

A support frame with two movable arms is provided, and a plurality of tensioners arranged in parallel are provided on the support frame;

In the folded state, hang the protective net on some of the tensioning members;

The movable arms extend while the protective net unrolls to accommodate the tunnel vault.

The net-laying device of this application can move the movable arm in the tunnel in a folded state, and switch the movable arm to the unfolded state during net-laying to realize one-time laying of the vault. After the laying is completed, it can be anchored and fixed to improve the efficiency of the tunnel. Improve the efficiency of net hanging operation.

Description of the drawings

Figure 1 is a three-dimensional view of the movable arm of the netting device in a folded state according to an embodiment of the present application;

Figure 2 is an exploded view of each segment of one of the movable arms in Figure 1;

Figure 3 is a front view of Figure 1 equipped with a protective net and a pull rope;

Figure 4 is a three-dimensional view of the movable arm in Figure 1 in an unfolded state;

Figure 5 is a front view of the netting device of Figure 4 loaded with a protective net;

Figure 6 is a schematic diagram of the cooperation between the mesh laying device in Figure 5 and the tunnel vault;

Figure 7 is a schematic diagram of the netting device connected to the operating arm according to an embodiment of the present application;

Figure 8 is a schematic structural diagram of the connection between the netting device and the protective net in a folded state according to an embodiment of the present application;

Figure 9 is a schematic structural diagram of the net laying device in Figure 8 in an unfolded state.

The reference symbols in the figure are explained as follows:

1000. Netting device; 100. Support frame; 101. Outside; 102. Inside;

110. Base; 120. Movable arm; 121. Segment;

130. Connecting arm; 131. Support piece;

141. The first hinge part; 142. The second hinge part; 143. The third hinge part;

151. First driving device; 152. Second driving device;

180. Pull rope; 190. Protective net;

200. Tensioning piece; 201. First side; 202. Second side;

300. Anchor rod; 400. Winding device;

500, vault; 510, side wall; 600, operating arm; 700, roller.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

To be clear, when a component is said to be "connected" to another component, it can be directly connected to the other component or there can also be an intermediate component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be a centered component at the same time.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the description of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

The existing tunnel includes a vault and side walls 510 connected to both sides of the vault, where the cross-sectional shape of the vault is a curved surface, and the cross-sectional shape of the side walls is generally a straight surface.

As shown in Figures 1 to 6, the present application provides a net laying device 1000, which is used to install the protective net 190 on the tunnel vault 500, then perform anchoring, and finally fix the protective net 190 on the vault 500. Prevent gravel from falling. The net laying device 1000 includes a support frame 100 and a plurality of tensioning members 200. The support frame 100 includes a base 110 in the middle, and two movable arms 120 respectively located on both sides of the base 110 and having an unfolded state and a folded state. When the movable arms 120 are unfolded, the shape of the support frame 100 is adapted to the tunnel vault 500 (as shown in Figures 5 and 6); the tension members 200 are arranged in parallel on the support frame 100. When in use, the tension members 200 move along the tunnel It extends in the depth direction (hereinafter referred to as the horizontal direction), and the tensioned protective net 190 is deployed as the movable arm 120 expands. For convenience of explanation, the net laying device 1000 has a length L, a width W and a height H as shown in the figure, and the length L is in the same direction as the horizontal direction.

The plane where the support frame 100 is located is the tunnel cross-section. Each tensioning member 200 is arranged in parallel and spaced apart, and is supported on the protective net so that it basically fits the tunnel vault. The space between the mutually spaced tensioning members 200 can For installation of anchor rod 300 (i.e. anchoring operation).

The support frame 100 has an outer side 101 close to the tunnel vault and an opposite inner side 102. "Adaptable" is understood to mean that the outer contour of the support frame 100 is an arc that is adapted to the shape of the tunnel vault, so that all tensioning members act on the arc. The various positions finally make the protective net basically match the tunnel vault. The extension direction of the tensioning member is the same as the depth direction of the tunnel (the extension direction of the short distance of the tunnel is approximately a straight line), and a larger area of protective net can be laid at one time.

The net-laying device of the present application completes the large-area net-hanging operation on the tunnel vault at one time, thereby improving the operating efficiency. If the net-laying device is not performing net-hanging operations, the movable arm can be switched to the folded state, which greatly reduces the width of the plane where the device is located and facilitates movement in the tunnel.

The movable arm 120 is movablely connected to the base 110, such as sliding or rotating. In one embodiment, the movable arm 120 is connected to the base 110. As shown in Figures 1 and 4, when the support frame 100 is in a folded state, the two movable arms 120 are movable. The arms 120 are positioned close to each other and the outer contour of the entire device is generally rectangular.

In a specific embodiment, the movable arm 120 has a multi-segment structure, and two adjacent segments 121 are rotatably connected. In the folded state, the segments 121 of the movable arm 120 are close to each other, thereby reducing the width of the netting device. Specifically, there are hinge parts between adjacent segments 121 and between the movable arm 120 and the base 110. In the folded state, the hinge parts that are spaced apart from each other are close to each other. As shown in Figures 1 and 2, the movable arm 120 includes three Each segment 121 has a first hinge part 141, a second hinge part 142 and a third hinge part 143. In the folded state, the first hinge part 141 and the third hinge part 143 are adjacent to each other.

Wherein, each section 121 of the movable arm 120 is arranged staggered in the horizontal direction. This allows the segments 121 to overlap partially or completely as shown in Figure 3, further reducing the width of the mesh laying device in the folded state. Moreover, each segment 121 can be unfolded/folded at the same time as the movable arm 120 itself, without restrictions on the movement sequence, reducing the time required for unfolding.

In one embodiment, a first driving device 151 for driving relative rotation between two adjacent segments 121 is provided at the connection point. The first driving device 151 is a motor. Specifically, the motor is installed at the end of one of the segments. The ends of adjacent segments are directly connected to the output shaft of the motor. When unfolded or folded, the motor drives one of the segments to face each other. The other segment rotates, and the direction of rotation can be directly controlled by the motor.

In one embodiment, the netting device 1000 includes a second driving device 152 that drives the two movable arms 120 to rotate toward each other or to expand. The second driving device 152 may be a motor or an oil cylinder. Considering the installation of the tensioner (described in subsequent embodiments) and the weight of the movable arm 120 , the second driving device 152 is preferably an oil cylinder, where the oil cylinder includes a cylinder body and a cylinder body. For the movable fitting piston, one end of the cylinder is fixed on the base 110, and one end of the piston is connected to the rotationally fitting segment 121 of the base.

In one embodiment, the tensioning member 200 is a rod-shaped structure, specifically a straight rod, which is installed on the outside of the support frame 100 , and the outside also includes hinge parts between adjacent segments 121 . The number of tensioning members installed on the base 110 or the segment 121 is one or more.

The netting device 1000 is generally installed on a carrier to facilitate mobile construction. In one embodiment, the netting device 1000 includes a connecting arm 130 connected to the base 110 and extending in the same direction as the tensioning member. The base is shown in the figure. Two tightening members 200 are symmetrically fixed on the base 110. The connecting arm 130 is provided with a support member 131 for fixing the tension member 200 of the station. The support member 131 is formed by connecting one or more pieces to provide the tension member 200. At least two support positions make the laying of the protective net more stable. The connecting arm 130 is connected to the carrier through other operation arms, for example. The two fasteners 200 are close to the hinged part of the movable arm 120 and the base 110, so they are subject to space constraints. Therefore, the second driving device uses an oil cylinder, which makes the space layout more flexible.

The tensioning member 200 has a first side 201 and a second side 202 relative to the base 110. The length of the tensioning member 200 on the first side 201 is greater than the length of the second side 202 where it is located. The connecting arm 130 is provided on the first side. Side 201 makes full use of space and reduces the length of the net laying device 1000.

As shown in Figures 8 and 9, in one embodiment, the net laying device 1000 includes a roller 700 for winding the protective net 190, which is provided with two tensioning members 200 on the outermost side. During the net laying operation, the support frame is in a folded state, the rollers 700 wrap around both sides of the protective net 190, and the remaining parts of the protective net 190 are hung on other tensioning members; when the support frame is unfolded, the movable arms drive each sheet The tightening parts move, and the tensioning parts 200 (except for the two edgemost tensioning parts) tighten the protective net 190, driving the roller 700 to rotate and adapt to the winding part of the protective net 190 until it adapts to the tunnel vault.

This application provides a method for laying protective nets on tunnel vaults, including the following steps:

S100, provide a support frame with two movable arms, and a plurality of tensioners 200 arranged in parallel are provided on the support frame;

S200, in the folded state, hang the protective net on some of the tensioning parts;

In S300, the movable arm extends while the protective net is rolled out to fit the tunnel vault.

In one embodiment, the method can be implemented using the net laying device of the above embodiment.

As shown in Figure 7, this application also provides an anchor trolley, which includes an operating arm 600 connected to the netting device 1000. The operating arm 600 can be connected to the base 110 or the connecting arm 130 to improve construction efficiency.

The anchor trolley also includes a winding device 400 and a driving device (not shown in the figure). The winding device 400 is used to wind the storage protective net 190, and the driving device is used to unwind the trend winding device 400 so that the protective net 190 is laid. on a plurality of tensioners 200 .

In one embodiment, an existing net-hanging device is installed on the anchor trolley for hanging nets on the straight side wall.

The net-hanging operation of the net-laying device of this application will be described in detail below:

First, the netting device moves with a carrier (such as an anchor trolley) in a folded state. The carrier is provided with a winding device 400 for winding the protective net, and a pull rope 180 connected to one end of the protective net 190. The pull rope 180 is wound around each tensioning member in the folded state as shown in Figure 3, and the other end of the pull rope 180 is pulled by the driving device.

As shown in Figure 5, during the net hanging operation, the net laying device is lifted close to the tunnel vault, the first driving device and the second driving device work to unfold the support frame. While unfolding the support frame or after unfolding the support frame, the driving device The work pulls the protective net through each tensioning member, then lifts the netting device in order to make it as close as possible to the tunnel vault, and finally performs anchoring operations.

The net-laying device of this application can move the movable arm in the tunnel in a folded state, and switch the movable arm to the unfolded state during net-laying to realize one-time laying of the vault. After the laying is completed, it can be anchored and fixed to improve the efficiency of the tunnel. Improve the efficiency of net hanging operation.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, all possible combinations should be used. It is considered to be within the scope of this manual. When technical features in different embodiments are reflected in the same drawing, it can be regarded that the drawing also discloses combination examples of the various embodiments involved.

The above embodiments only express several implementation modes of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application.

Claims (12)

1. The netting device used to install the protective net on the tunnel vault is characterized by including: The support frame includes a base in the middle and two movable arms located on both sides of the base and having an unfolded state and a folded state. When the two movable arms are unfolded, the shape of the support frame is consistent with the tunnel vault. adapt; A plurality of tensioning members are arranged in parallel on the support frame. When in use, the tensioning members extend along the depth direction of the tunnel and tighten the protective net as the movable arm expands. 2. The net laying device according to claim 1, characterized in that the movable arm is rotationally connected to the base. 3. The net laying device according to claim 2, characterized in that the movable arm has a multi-segment structure, and two adjacent segments are rotationally connected. 4. The net laying device according to claim 3, characterized in that, in the folded state, each segment of the movable arm is close to each other. 5. The net laying device according to claim 4, characterized in that each section of the movable arm is arranged staggered in the horizontal direction. 6. The net laying device according to claim 3, characterized in that a first driving device for driving the relative rotation of two adjacent segments is provided at the connection point between the two adjacent segments. 7. The net laying device according to claim 2, characterized in that it includes a second driving device that drives the two movable arms to rotate toward each other or expand. 8. The net laying device according to claim 1, characterized in that the tensioning member is a rod-shaped structure and is arranged outside the support frame. 9. The net laying device according to claim 1, characterized in that it includes a connecting arm connected to the base and extending in the same direction as the tensioning member, and the connecting arm is provided with a fastener that is fixed adjacent to the tensioning member. supporting item. 10. The net laying device according to claim 1, characterized in that it includes rollers for winding the protective net provided with two tensioning members on the outermost side. 11. Anchor trolley, characterized in that it includes a net-laying device according to any one of claims 1 to 10 and an operating arm connected to the net-laying device. 12. The method of laying a protective net on the tunnel vault is characterized by including the following steps: A support frame with two movable arms is provided, and a plurality of tensioners arranged in parallel are provided on the support frame; In the folded state, hang the protective net on some of the tensioning members; The movable arms extend while the protective net unrolls to accommodate the tunnel vault.